How does the enzyme complex know to synthesize this particul

How does the enzyme complex know to synthesize this particular sequence of RNA?

Solution

Transcription! Transcription is the first step to expression of a gene. That happens when the genetic code for the gene, which is in the DNA, is read by RNA polymerase.

Now, how does RNA polymerase know where to bind? It knows with the help of ‘promoters’. Promoters are sequences in a DNA which can be 100-1000 base pairs long. And they are obviously located at the transcription start site of any gene. These promoter sequences are special, as they contain special DNA sequence which help the initial binding of the RNA polymerase and transcription factors( they recruit RNA polymerase and control the transcription rate).

so, How does the enzyme complex know to synthesize this particular sequence of RNA?
It\'s the promoter! The promoter sequence tells the required enzymes, proteins and the complexes where to start and which RNA sequence they are going to be synthesizing.